diff --git a/publications/hasy/abstract.tex b/publications/hasy/abstract.tex
index c90bbfe..2a9831e 100644
--- a/publications/hasy/abstract.tex
+++ b/publications/hasy/abstract.tex
@@ -1,6 +1,7 @@
 \begin{abstract}
 This paper describes the \dbName{} dataset. \dbName{} is a publicly available,
 free of charge dataset of single symbols similar to MNIST. It contains
-\dbTotalInstances~instances of \dbTotalClasses~classes, split into training and
-test set.
+\dbTotalInstances~instances of \dbTotalClasses~classes. \dbName{} contains two
+challenges: A classification challenge with 10~pre-defined folds for 10-fold
+cross-validation and a verification challenge.
 \end{abstract}
diff --git a/publications/hasy/literatur.bib b/publications/hasy/literatur.bib
index 7a3db15..d45c7d5 100644
--- a/publications/hasy/literatur.bib
+++ b/publications/hasy/literatur.bib
@@ -135,6 +135,15 @@
   Volume                   = {12}
 }
 
+@InProceedings{risi2010evolving,
+  Title                    = {Evolving the placement and density of neurons in the hyperneat substrate},
+  Author                   = {Risi, Sebastian and Lehman, Joel and Stanley, Kenneth O},
+  Booktitle                = {Proceedings of the 12th annual conference on Genetic and evolutionary computation},
+  Year                     = {2010},
+  Organization             = {ACM},
+  Pages                    = {563--570}
+}
+
 @Article{salzberg1997comparing,
   Title                    = {On comparing classifiers: Pitfalls to avoid and a recommended approach},
   Author                   = {Salzberg, Steven L},